René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Allow manual assignment of VR public IP address in Routed Mode networks","articleBody":"### The required feature described as a wish\n\nHi,\n\n**Description**\n\nIn routed mode networks, the VR currently receives its public IP address dynamically from the available public IP pool. There is no supported mechanism to manually assign or pin a specific public IP address to the VR itself.\n\nFor operators integrating CloudStack into existing routed infrastructure, deterministic VR public IP assignment is often required for:\n\n- Upstream firewall rules\n- Static routing policies\n- BGP/edge integrations\n- Monitoring and observability\n- DNS and reverse DNS consistency\n- HA/failover operational predictability\n- Migration scenarios from existing infrastructure\n\n**Current Behavior**\n\nWhen a routed mode network is created, the VR public IP is automatically selected from the public IP range by CloudStack.\n\n**Operators cannot:**\n\n- Specify a desired public IP during network creation\n- Reserve a public IP specifically for VR assignment\n- Reassign the VR to a chosen public IP after deployment\n\n**Proposed Feature**\n\nAs an Operator I would like to deterministicly assign public IP address of a VR in Routed Mode networks.\n\n**Proof of Concept / Observed Behavior**\n\nI tested this by modifying the validation logic that currently rejects --srcipaddress on networks without NAT enabled (which includes routed mode networks).\n\nAfter relaxing the conditional check to allow --srcipaddress in routed networks [(Starting here)](https://github.com/apache/cloudstack/blob/5893ba5a8c00aa445be252e2dd0bc557b0cec3fc/server/src/main/java/com/cloud/network/IpAddressManagerImpl.java#L1641), the VR was successfully deployed using the manually specified public IP and operated correctly.\n\nThis suggests the limitation is primarily an API/CLI validation restriction rather than a fundamental networking or VR capability limitation.\n\n**Example**\n\n**Current behavior:**\n\n`cloudmonkey create network ... --srcipaddress=\u003cip\u003e`\n\nGive a result that the parameter srcipaddress is not supported for networks without SourceNat.\n\n**Modified behavior:**\n\nAllow srcipaddress for routed mode networks\nVR deploys successfully with the specified public IP\n\n**Suggestion**\n\nThe validation logic could potentially be updated to:\n\n- Continue rejecting srcipaddress for unsupported network types\n- Explicitly allow it for routed mode networks where deterministic VR addressing is desired\n\nWhat are your thoughts?\n","author":{"url":"https://github.com/vA-Ali","@type":"Person","name":"vA-Ali"},"datePublished":"2026-05-18T14:48:28.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":4},"url":"https://github.com/13184/cloudstack/issues/13184"}